Cygwin's libm support for cbrtl/sqrtl (was: Testing __float128 [Cygwin])

[Tobias Burnus]

  Hi Angelo, hello Dave and Christopher,

Dave and Christopher: Angelo sees the following failure with Cygwin, cf. 
http://gcc.gnu.org/ml/fortran/2010-09/msg00142.html

Thus, my question is: Are those functions (cbrtl, sqrtl) indeed 
unimplemented in Cygwin? Or exists there some Cygwin libm which contains 
them?
I assume they are missing because they are listed as such at 
http://www.cygwin.com/cygwin-api/std-notimpl.html - however, I do not 
know whether that page is outdated.

On 09/06/2010 12:33 AM, Angelo Graziosi wrote:
>> /tmp/libquad/src/math/cbrtq.c:26: undefined reference to `_cbrtl'
>> /tmp/libquad/src/math/sqrtq.c:26: undefined reference to `_sqrtl'

The library to which requires those functions is linked to at 
http://gcc.gnu.org/ml/fortran/2010-08/msg00499.html

Tobias